Black monkey house: Scala variable declaration mode

match each case it can be extracted individually, meaning is the same, as follows

println("变量 声明中的模式")
val (x,y) = (1,2)
//商3 余1
//val (q,r) = BigInt(10)./%(3)
val (q,r) = BigInt(10) /% 3
println((x,y))
println((q,r))
 
val arr = Array(1, 7, 2, 9)
val Array(first, second, _*) = arr
println(first, second)

Reproduced in: https: //www.jianshu.com/p/e24c5fd45b65